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Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]  
Schedule Of Roll Forward Activity In Insurance Reserves [Table Text Block]
While recorded accruals are based on the ultimate liability, which includes amounts in excess of the deductible, a corresponding receivable for amounts in excess of the stop loss deductible is included in current assets in the consolidated balance sheets:
 
 
(in thousands)
2014
2013
2012
Balance at beginning of period
$
39,111
$
39,583
$
38,850
Net increases in reserves
16,220
16,861
19,743
Net payments made
(15,851
)
(17,333
)
(19,010
)
Balance at end of period
$
39,480
$
39,111
$
39,583